Games like Abyssal Reflections
Games like Abyssal Reflections include Firewatch, Summerland, What Remains of Edith Finch, CARIMARA: Beneath the forlorn limbs, and Amnesia: A Machine For Pigs. We matched them by the tags players give Abyssal Reflections on Steam (Casual, Point & Click, Interactive Fiction, Walking Simulator, and Exploration): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Walking Simulator · Atmospheric · Exploration

Summerland
Shared: Walking Simulator · Point & Click · Interactive Fiction

What Remains of Edith Finch
Shared: Walking Simulator · Exploration · Atmospheric

CARIMARA: Beneath the forlorn limbs
Shared: Exploration · 3D · Walking Simulator

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Exploration · Interactive Fiction

BABBDI
Shared: Exploration · Walking Simulator · Casual

Gone Home
Shared: Walking Simulator · Exploration · First-Person

The Exit 8
Shared: Exploration · Walking Simulator · 3D

Scanner Sombre
Shared: Walking Simulator · Exploration · Atmospheric

Dear Esther: Landmark Edition
Shared: Walking Simulator · Interactive Fiction · Exploration

Road 96: Mile 0
Shared: Interactive Fiction · Exploration · Walking Simulator

The Room
Shared: Point & Click · Atmospheric · Casual

Dreamcore
Shared: Walking Simulator · Exploration · 3D

Amanda the Adventurer
Shared: First-Person · Point & Click · Interactive Fiction

The Witness
Shared: Exploration · First-Person · Walking Simulator

The Room 4: Old Sins
Shared: Point & Click · Exploration · Mystery

Before Your Eyes
Shared: Interactive Fiction · Walking Simulator · Emotional

Riven
Shared: Exploration · First-Person · Walking Simulator

Fears to Fathom - Woodbury Getaway
Shared: Casual · Walking Simulator · First-Person

Monument Valley 2
Shared: Casual · Point & Click · Exploration

Iron Lung
Shared: Atmospheric · Minimalist · Horror

POOLS
Shared: Walking Simulator · Exploration · Atmospheric

Dagon: by H. P. Lovecraft
Shared: Atmospheric · First-Person · Interactive Fiction

Interior Worlds
Shared: Casual · Exploration · Walking Simulator